package com.yc.cloud.common.oauth.wechat.utils;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONUtil;
import com.yc.cloud.common.oauth.wechat.dto.QRCodeDto;
import com.yc.cloud.common.oauth.wechat.dto.resp.JSCode2SessionResp;
import lombok.extern.slf4j.Slf4j;
import lombok.val;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

/**
 * @title: 微信小程序工具类
 * @Author JackGu
 * @Date: 2022/10/22 16:17
 * @Version 1.0
 */
@Slf4j
public class WxMiniProgramUtils {

    //这里有点奇怪，为什么不是和下面一样的请求前缀
    private static final String BASE_URL = "https://api.weixin.qq.com";
    public static final String CGI_BIN_URL = BASE_URL + "/cgi-bin";
    public static final String SNS_URL = BASE_URL + "/sns";


    public static final String SUCCESS = "0";


    /***
     * description: 获取公众号AccessToken
     * @param
     * @return java.lang.String
     */
    public static String getAccessToken(String appid, String appKey) {
        val url = CGI_BIN_URL + "/token?grant_type=client_credential&appid=" + appid + "&secret=" + appKey;
        val result = HttpUtil.get(url);
        log.info("getAccessToken result \n" + result);
        return result;
    }

//    public static String getUserInfo(String accessToken, String openId) {
//        val url = BASE_URL + "/userinfo?access_token=" + accessToken + "&openid=" + openId + "&lang=zh_CN";
//        val result = HttpUtil.get(url);
//        System.out.println("getUserInfo result \n" + result);
//        return result;
//    }


    public static String getOpenId(String jsCode, String appid, String appKey) {
        //与微信
        val wechatLoginUrl = SNS_URL + "/jscode2session?appid=" + appid + "&secret=" + appKey + "&js_code=" + jsCode + "&grant_type=authorization_code";
        val result = HttpUtil.get(wechatLoginUrl);
        log.info("getOpenId result \n" + result);
        val jsCode2SessionResp = JSONUtil.toBean(result, JSCode2SessionResp.class);
        if (StrUtil.isEmpty(jsCode2SessionResp.getErrcode())) {
            return jsCode2SessionResp.getOpenid();
        }
        log.error("getOpenId failed,msg=" + jsCode2SessionResp.getErrmsg());
        //Asserts.fail("获取OpenId失败,Msg=" + jsCode2SessionResp.getErrmsg());
        return "";
    }


    public static byte[] getUnlimitedQRCode(String accessToken, QRCodeDto qrCodeDto) {
        val url = BASE_URL + "/wxa/getwxacodeunlimit?access_token=" + accessToken;
        try {
            val response = HttpUtil.createPost(url).header("Content-Type", "application/json") // 设置请求头，指定发送 JSON 数据
                    .body(JSONUtil.toJsonStr(qrCodeDto)).execute();
            if (response.isOk()) {
                return response.bodyBytes();
            }
//            log.info("getUnlimitedQRCode result--->");
//            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


//    /***
//     * description: 获取临时票据
//     * @param accessToken  访问令牌
//     * @return java.lang.String
//     */
//    public static String getTicket(String accessToken) {
//        val url = BASE_URL + "/ticket/getticket?access_token=" + accessToken + "&type=jsapi";
//        val result = HttpUtil.get(url);
//        val getTicketResp = JSONUtil.toBean(result, GetTicketResp.class);
//        if (SUCCESS.equals(String.valueOf(getTicketResp.getErrcode()))) {
//            return getTicketResp.getTicket();
//        }
//        return "";
//    }

//


    public static Map<String, String> sign(String jsapi_ticket, String url) {
        Map<String, String> ret = new HashMap<>();
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        String string1;
        String signature = "";

        //注意这里参数名必须全部小写，且必须有序
        string1 = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + nonce_str + "&timestamp=" + timestamp + "&url=" + url;
        System.out.println(string1);

        try {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(string1.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        ret.put("url", url);
        ret.put("jsapi_ticket", jsapi_ticket);
        ret.put("nonceStr", nonce_str);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);
        //ret.put("appid", appid);

        return ret;
    }

    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash) {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }

    private static String create_nonce_str() {
        return UUID.randomUUID().toString().replace("-", "");
    }

    private static String create_timestamp() {
        return Long.toString(System.currentTimeMillis() / 1000);

    }


    public static void main(String[] args) {
//        val openid = getOpenId("0a1w5lGa1X6RDG0IsjGa1rlMfJ2w5lGG");
//        log.info(openid);
    }
}
